Sayyidah Safiyyah bint Huyayy (may Allah be pleased with her), the wife of the Prophet (peace and blessings be upon him), narrates that she came to visit the Messenger of Allah (peace and blessings be upon him) in the last ten days of Ramadan while he (peace and blessings be upon him) was in i'tikaf in the mosque. She talked with him (peace and blessings be upon him) for a while, then stood up to go back, and the Messenger of Allah (peace and blessings be upon him) also stood up with her to see her off. When they reached near the door of the mosque, by the door of Sayyidah Umm Salamah (may Allah be pleased with her), the wife of the Prophet (peace and blessings be upon him), two Companions from the Ansar passed by the Prophet (peace and blessings be upon him). They greeted the Messenger of Allah (peace and blessings be upon him) with salam and went on. So the Messenger of Allah (peace and blessings be upon him) said to them: "Wait, this is Safiyyah bint Huyayy." They said: Subhan Allah (Glory be to Allah), O Messenger of Allah! And these words of the Messenger of Allah (peace and blessings be upon him) weighed heavily upon them. So the Messenger of Allah (peace and blessings be upon him) said: "Satan flows in a human being like blood, and I feared that he might cast some whispering into your hearts."
Hadith Referenceالمعجم الكبير للطبراني / مسند النساء / 20562